Two shootings and a robbery are believed to be the work of one man. At 7:15 a.m. Friday, a man was found shot to death, in a car, near the Creekside Terrace Recreation Trails in Salinas. A short time later a pedestrian was shot and wounded on Del Monte Boulevard in Castroville, near where a North Monterey County High School student was robbed. The school was locked down as a safety precaution. A 19-year-old suspect is in custody. He is name is being withheld pending formal charges.